71804 CD/P4DGC
71800 Series Super Precision Angular Contact Ball Bearings
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71804 CD/P4DGC Bearing Product Overview & Core Advantages
The 71804 CD/P4DGC is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the P4 tolerance class, this metric bearing is engineered to handle combined loads with high reliability. Its universal matchable (SU) design allows for flexible mounting in pairs to support bidirectional axial loads, while the moderate preload (Class C) ensures optimal stiffness and minimal runout. This makes it an ideal solution for high-speed spindles and other precision machinery.
71804 CD/P4DGC Bearing Model Code Explained, Specifications & Naming Convention
- 71804: Basic bearing designation for a super-precision angular contact bearing with 20mm bore, 32mm OD, and 14mm width.
- C: Represents a 15° contact angle, optimized for high-speed applications with moderate axial load capacity.
- D: Indicates the bearing is supplied as a universal matchable (SU) pair (2 bearings in set).
- P4: Denotes the tolerance class, equivalent to ISO Class 4 (ABEC 7), ensuring extremely tight dimensional and running accuracy.
- D: Specifies moderate preload (Class C) for enhanced system rigidity.
- GC: Indicates specific internal clearance and preload optimization for high-speed operation.
71804 CD/P4DGC Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The double-row angular contact design and phenolic cage provide superior structural stability and dimensional accuracy under P4 tolerance class. The moderate preload eliminates internal clearance, ensuring high system stiffness and precise rotational performance.
Optimized Load Capacity: With a 15° contact angle and universal matchable arrangement, this bearing effectively supports combined radial and axial loads in both directions. The dynamic load rating of 1404 lbf and static load rating of 1192 lbf ensure reliable operation under demanding conditions.
High-Speed Capability: The phenolic resin cage and precision-ground chrome steel components enable exceptional high-speed performance, with a limiting speed of 100,500 rpm. The optimized internal geometry minimizes friction and heat generation.
Precision Engineering: Manufactured with tight dimensional tolerances (bore/OD: -0.004mm to 0) and featuring 17 precision balls of 3.175mm diameter, this bearing delivers consistent, high-accuracy performance essential for precision applications.
71804 CD/P4DGC Bearing Typical Application Areas
The 71804 CD/P4DGC is specifically designed for high-precision, high-speed applications including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Instrumentation - Measuring equipment and laboratory instruments
- High-Speed Motors - Spindle motors and servo drives
- Medical Equipment - Dental handpieces and surgical tools
- Aerospace Components - Gyroscopes and navigation systems
- Semiconductor Manufacturing - Wafer handling and processing equipment
